基于LID的沈阳市径流污染控制及对策

Control and Countermeasure of Runoff Pollution in Shenyang City Based on LID

目的研究土地利用方式的改变对径流污染负荷输出的影响,提出控制屋面径流和路面径流污染的低影响开发(LID)技术措施,为沈阳市水环境质量的改善和"海绵试点城市"的申报提供技术支持.方法根据沈阳市2005年、2010年和2014年的土地利用分类数据,利用线性模型,分析了不同土地利用方式污染负荷输出情况,识别土地利用方式的改变与径流污染负荷的关系,识别不同土地利用方式径流污染负荷的贡献程度.结果在降雨量相似的条件下,径流污染物TN、TP、COD和SS的输出量在逐年增大,2014年COD的输出量是2005年的1.11倍,TN、TP和SS的输出量为2005年的1.12倍.结论农业用地、城市用地、林业用地和未利用地4种土地利用方式中城市用地径流污染贡献最大,径流污染物中COD、SS的污染物输出量最高.2005年到2014年沈阳市城市用地和农业用地在增加,林业用地和未利用地在逐年减少.

Low impact development technology measures（ LID） on control roof runoff and road runoff pollution was proposed on the basis of effects of the land utilization way change on runoff pollution load output,which provide technical support for Shenyang water environment quality improvement and the declaration of sponge pilot cities. According to 2005,2010 and 2014 land use classification data of Shenyang,the pollution load output in the different land utilization way was analyzed by using the linear model. Then the relationship between land use change and runoff pollution load was abtained. Under similar conditions of rainfall TN,TP,COD and SS in the runoffincrease year by year. In 2014 the amount of COD was 1. 11 times that in 2005. And the amount of TN,TP and SS was 1. 12 times that in 2005. In agricultural land,urban land,forestry and unused land the largest runoff pollution contribution is urban land,COD and SS were highest in runoff pollutants.From 2005 to 2014 in Shenyang the amount of urban and agricultural land increased,forestry and unused land decreased year by year.